Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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Comparative Study on Efficiencies of Naturally-Ventilated Multi-Span Greenhouses in Korea

다연동 온실의 자연환기효율성 비교 분석

  • Kwon, Soon-Hong (Dept. of Bio-Industrial Machinery Eng., Pusan National Univ.) ;
  • Jung, Sung-Won (Dept. of Bio-Industrial Machinery Eng., Pusan National Univ.) ;
  • Kwon, Soon-Gu (Dept. of Bio-Industrial Machinery Eng., Pusan National Univ.) ;
  • Park, Jong-Min (Dept. of Bio-Industrial Machinery Eng., Pusan National Univ.) ;
  • Choi, Won-Sik (Dept. of Bio-Industrial Machinery Eng., Pusan National Univ.) ;
  • Kim, Jong-Soon (Dept. of Bio-Industrial Machinery Eng., Pusan National Univ.)
  • 권순홍 (부산대학교 바이오산업기계공학과) ;
  • 정성원 (부산대학교 바이오산업기계공학과) ;
  • 권순구 (부산대학교 바이오산업기계공학과) ;
  • 박종민 (부산대학교 바이오산업기계공학과) ;
  • 최원식 (부산대학교 바이오산업기계공학과) ;
  • 김종순 (부산대학교 바이오산업기계공학과)
  • Received : 2016.12.06
  • Accepted : 2017.02.09
  • Published : 2017.03.31
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Abstract

This research analyzed the ventilation effect of the multi-span greenhouse based on the types of greenhouse structure, weather conditions, and locations inside the greenhouse. To compare and analyze the ventilation effects with different types of greenhouse, the uniform environmental conditions should be selected in advance. But these factors are not controlled and require tense many precision facilities and labor forces. Thus, the CFD simulation was used for the air stream to be analyzed qualitatively and quantitatively. In addition, for the ventilation effect analysis, the TGD (Tracer Gas Decay) was used to overcome the shortcomings of the current ventilation measurement method. The calculation error of ventilation rate using TGD was low (10.5%). Thus, the TGD is very effective in calculating the ventilation efficiency. The wind direction of 90 degrees showed the best ventilation effect. The ventilation rate also decreased along the air circulation path, and the rate was the lowest around the outlet. The computed fluid method (CFD) turned out to be a power tool for simulating flow behavior in greenhouse.

Keywords

References

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